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Figure 39 Picture

Figure 39

Figure 39. Massey sounder, a propeller driven sounding device first developed in 1802 by Edward Massey. Many improvements were made to this device through the Nineteenth Century. The instrument in the image was created by Thomas Walke r in 1874. It consists of a propeller driven registering device which is fixed to a sounding line and weighted by ballast.

Photo Category: Oceanography - Historical instruments

Author: Y. Berard/Oceanographic Museum of Monaco/ NOAA

License: Public Domain Mark 1.0 (Public domain)
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18th October 2015
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